Nothing would delight me more than to see his hair lightened but, to be fair, our discussion was in reaction to the concept art posted in which he has jet black hair so you can perhaps understand where we have arrived at the conclusion that Momoa wont get a dye job or highlights?
Things can change though, so I live in hope (seen some really good manips of Mamoa with blonde her too, no reason why it couldnt actually work). As I said before, its just my own personal preference as a dark haired Aquaman is alien to me. Its not a deal breaker 'im boycotting this movie or else' kind of thing. Far from it.